atoms
Yes.
are molecules are joined together to form elements
are molecules are joined together to form elements
Two or more elements that are chemically joined together is a compound, I think.
If two elements are joined together it is a compound
A substance made of two or more elements that have been chemically joined is called a compound.
A material that contains three elements joined in a fixed proportion is a pure substance called a compound. It is not a mixture.
A compound is a substance composed of two or more different elements chemically joined together. This joining of elements creates a new substance with unique properties.
In a scientific context, a compound is a substance formed when two or more elements are chemically bonded together in a fixed ratio. These elements interact to create new properties and characteristics distinct from the individual elements.
Elements cannot be lost/gained: this is the law of mass conservation.
A compound is two or more elements joined together.
Carbon, hydrogen, and oxygen.